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Doubly Decoupled Structure in Odd-Odd ^(178-186)Ir Nuclei

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Chinese Physics Letters 2001年第1期18卷 27-29页

作者： ZHANG Yu-Hu t.hayakawa M.Oshima Y.toh J.Katakura Y.Hatsukawa M.Matsuda N.Shinohara t.Ishii H.Kusakari M.Sugawara t.Komatsubara Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 Japan Atomic Energy Research Institute TokaiIbaraki 319-1195Japan Chiba University Inage-kuChiba 263-8512Japan Japan Chiba Institute of technology NarashinoChiba 275-0023Japan Institute of Physics and tandem Accelerator Center University of TsukubaIbaraki 305-0006Japan

High-spin states in 178'180Ir have been studied via the 152'154Sm(31P,5nγ)reactions through excitation functions,x-γandγ-γ-t coincidence measurements.A doubly decoupled band has been identified in each of the *** level spacings for such structures in odd-odd ^(178-186)Ir have been inspected and thus a regular level staggering as a function of the neutron number is *** particular phenomenon may be associated with bandmixing at lower excitation energies.

关键词： excitation coincidence

High-spin states in ^(190)Pt

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Chinese Physics C 2008年第1期32卷 31-33页

作者：马龙周小红 M.Oshima Y.toh 张玉虎郭应祥雷相国 M.Koizumi A.Osa t.hayakawa Y.Hatsukawa t.Shizuma M.Sugawara Institute of Modern Physics Chinese Academy of Sciences Japan Atomic Energy Research Institute.tokai Ibaraki 319-1195 Japan Japan Atomic Energy Research Institute tokai Ibaraki 319-1195Japan Chiba Institute of technology Narashino Chiba 275-0023Japan

the level structure of ^19Opt has been studied experimentally using the ^176yb （^18O, 4n） reaction at beam energies of 88 and 95 MeV. γ-γ-t coincidence measurements were carried out. Based on the analysis of t-t coincidence relationships, the level scheme of ^190Pt is extended to high-spin states. A new structure built on the 3413.6 keV 14＋ state has been observed, and the ＂vi13/2^-2 vh9/2^-1 vj （j = P3/2 or f5/2） configuration is tentatively assigned to it.

关键词： γ-γcoincidence γ-ray spectroscopy DCO ratio

High-spin states and signature inversion in odd-odd ^(182)Au

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Science China(Physics,Mechanics & Astronomy) 2003年第4期46卷 382-389页

作者：张玉虎许甫荣何建军刘忠周小红甘再国 M.Oshima t.hayakawa Y.toh t.Shizuma J.Katakura Y.Hatsukawa M.Matsuda H.Kusakari M.Sugawara K.Furuno t.Komatsubara t.Une 温书贤王治民 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Department of technical Physics and MOE Key Laboratory Peking UniversityBeijing 100871China Japan Atomic Energy Research Institute TokaiIbaraki 319-1195Japan Chiba University Inage-kuChiba 263-8512Japan Chiba Institute of technology NarashinoChiba 275-0023Japan Institute of Physics and tandem Accelerator Center University of TsukubaIbaraki 305-0006Japan China Institute of Atomic Energy Beijing 102413China

High-spin states in182Au have been produced and studied via the152Sm(35Cl,5nγ)182Au reaction. the level scheme consisting of the πh 9/2?νi 13/2 and πi 13/2?νi 13/2 bands has been established for the first time. the low spin signature inversion in both bands has been found. the observed signature inversion phenomena can be interpreted qualitatively using the pairing and deformation self-consistent cranked Wood-Saxon calculations.

关键词： deformed odd-odd182Au rotational bands signature inversion cranked shell model

形变双奇核^(178)Ir转动带能级的旋称反转

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高能物理与核物理 2000年第12期24卷 1123-1130页

作者：张玉虎 t.hayakawa M.Oshima Y.toh J.Katakura Y.Hatsukawa M.Matsuda N.Shinohara t.Ishii H.Kusakari M.Sugawara t.Komatsubara 中国科学院近代物理研究所兰州730000 Japan Atomic Energy Research Institute Chiba University Chiba Institute of technology Institute of Physics and tandem Accelerator Center

利用１５２Ｓｍ（３１Ｐ，５ｎγ）１７８Ｉｒ反应产生并研究了双奇核１７８Ｉｒ的高自旋态．实验中进行了１７８Ｉｒ核的在束 γ测量，包括γ射线的激发函数测量、Ｘ－γ和γ－γ符合测量．首次建立了双奇核１７８Ｉｒ基于πｈ９／２... 详细信息

利用１５２Ｓｍ（３１Ｐ，５ｎγ）１７８Ｉｒ反应产生并研究了双奇核１７８Ｉｒ的高自旋态．实验中进行了１７８Ｉｒ核的在束 γ测量，包括γ射线的激发函数测量、Ｘ－γ和γ－γ符合测量．首次建立了双奇核１７８Ｉｒ基于πｈ９／２νｉ１３／２和πｈ１１／２νｉ１３／２准粒子组态上的转动带能级纲图．发现在低自旋区，两个转动带能级均出现旋称反转．对此核区半退耦带的旋称反转作了简要的分析和讨论．

关键词：在束γ谱学形变双奇核转动带旋称反转

减小键合应力改进(GaAl)As可见光(740nm)激光器寿命

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半导体光电 1983年第3期 78-80页

作者： t.hayakawa 刘维芳

业已证明将顶层和衬底厚度调整到一适当值,可减小因键合工艺而引起的有源层应力。激射波长为740nm的(GaAI)As V形沟道衬底内部条形激光器在50℃的寿命试验说明:采用厚顶层(～40μm)和减薄了的衬底(～80μm)使其寿命得到很大改进。

关键词：有源层键合工艺外力封装工艺光激射器电子器件激光器 GaAl)As 激射波长 nm

Structure of the πg7／2[404]7／2^＋ Band in Odd Proton Nucleus ^123I

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Chinese Physics Letters 2004年第6期21卷 1024-1026页

作者： WANGShou-Yu MAYing-Jun t.Komatsubara LIUYun-Zuo ZHANGYu-Hu K.Furuno t.hayakawa J.Mukai Y.Iwata t.Morikawa G.B.Hagemann G.Sletten J.Nyberg D.Jerrestam H.J.Jensen J.Espino J.Gascon N.Gjφrup B.Cederwall P.O.tjφm DepartmentofPhysics JilinUniversityChangchun130023 InstituteofPhysicsandtandemAcceleratorCenter UniversityofTsukubaIbaraki305Japan InstituteofModernPhysics ChineseAcademyofSciencesLanzhou730000 DepartmentofPhysics FacultyofScienceHiroshimaUniversityHiroshima724Japan DepartmentofPhysics FacultyofScienceKyushuUniversityFukuoka812Japan NielsBohrInstitute TandemAcceleratorLaboratoryRisφDK-4000RoskildeDenmark ManneSiegbabnInstituteofPhysics S-10405StockholmSweden DepartmentofPhysics UniversityofOsloNorway

High spin states of the odd proton nucleus 123I have been populated in the reaction 116Cd(14N, 5n2p) at a beam energy of 65MeV. two previously known positive-parity ΔI = 2 sequences have been extended up to 31/2+ and 41/2+. In addition, a number of ΔI = 1 transitions linking the two ΔI = 2 sequences have been observed. It is suggested that both the ΔI = 2 sequences are built upon the oblate πg7/2[404]7/2+ Nilsson configuration.

关键词：

Search for Signature Inversion in the πi_(13/2) vi_(13/2) Band in Odd-Odd ^(178I)r

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Chinese Physics Letters 2001年第10期18卷 1323-1326页

作者： ZHANG Yu-Hu t.hayakawa M.Oshima Y.toh J.Katakura Y.Hatsukawa M.Matsuda N.Shinohara t.Ishii H.Kusakari M.Sugawara t.Komatsubara K.Furuno Institute of Modern Physics:Chinese Academy of Sciences Lanzhou 7300002 Japan Atomic Energy Research Institute TokaiIbaraki 319-1195Japan Chiba University Inage-kuChiba 263-8512Japan Chiba Institute of technology NarashinoChiba 275-0023Japan Institute of Physics and tandem Accelerator Center University of TsukubaIbaraki 305-0006Japan

the search for the ri_(13/2) vi_(13/2 ) band in ^(178)Ir has been conducted through the ^(152)Sm(^(31) P, 5nγ)^( 178)Ir reaction and the excitation functions, x-γ and γ-γ-t coincidence measurements. Five rotational bands have been newly identified. the low-spin signature inversion in the πi13/2 vi13/2 band has been confirmed by the observations of linking transitions and signature crossing at I = 25.5 h. the inversion phenomenon in rh11/2 vi_(13/2), rh9/2 vi_(13/2) and ri_(13/2) vi13/2 structures in ^(178)Ir provides a unique testing ground for different theoretical interpretations.

关键词： signature Inversion

利用深部非弹反应对Z≈56,N≈80区核激发态的探索性研究

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高能物理与核物理 2001年第9期25卷 845-849页

作者：刘忠 M.Oshima t.Ishii t.hayakawa Y.toh Y.Hatsukawa H.Sakurai M.Notani M.Ishihara 中国科学院近代物理研究所兰州730000 Japan Atomic Energy Research Institute(JAERI) the Institute of Physical and Chemical Research(RIKEN)

通过 4 1 0MeV82 Se轰击天然Ba靶引起的深部非弹反应布居产生了类弹和类靶余核的激发态 ,利用在束γ谱学方法测量了它们的退激γ .通过γ -γ符合测量估计了类弹、类靶余核激发态的产生截面 ,在多个类靶余核中观测到了新γ跃迁 ,并建立... 详细信息

通过 4 1 0MeV82 Se轰击天然Ba靶引起的深部非弹反应布居产生了类弹和类靶余核的激发态 ,利用在束γ谱学方法测量了它们的退激γ .通过γ -γ符合测量估计了类弹、类靶余核激发态的产生截面 ,在多个类靶余核中观测到了新γ跃迁 ,并建立了136 Ba的新能级纲图 ,说明利用深部非弹反应研究Z≈ 56,N≈ 80区高自旋态是有效。

关键词：深部非弹反应丰中子核高自旋态核激发态在束γ谱学法 Z≈56 N≈80区能级纲图

MeV-and Sub-MeV-photon Sources Based on Compton Backscattering at SPring-8 and KPSI-JAEA

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原子核物理评论 2009年第S1期26卷 94-99页

作者： K.Kawase M.Kando t.hayakawa I.Daito S.Kondo t.Homma t.Kameshima H.Kotaki Y.Fukuda A.Faenov t.Shizuma S.V.Bulanov t.Kimura t.tajima M.Shoji S.Suzuki K.tamura H.Ohkuma Y.Arimoto t.Yorita M.Fujiwara S.Okajima Kansai Photon Science Institute Japan Atomic Energy Agency Japan Synchrotron Radiation Research Institute Department of Physics Osaka University Research Center for Nuclear Physics Osaka University

Recently we have constructed two facilities for generating photon beams in the MeV and sub-MeV energy regions by means of the Compton backscattering with a laser and an electron beam at SPring-8 and at Kansai Photon Science Institute of Japan Atomic Energy Agency(KPSI-JAEA). the MeV-photon source at SPring-8 consists of a continuous-wave optically-pumped far infrared laser with a wavelength of 118.8 μm and an 8 GeV stored electron beam. Present MeV-photon flux is estimated to be 1.3×103 photons/s. On the other hand,the sub-MeV-photon source at KPSI-JAEA consists of a pulse Nd∶YAG laser with a wavelength of 1 064 nm and a 150 MeV electron beam accelerated by microtron. In the first trial of the photon production in this source,backscattered photon flux is estimated to be 20 photons/pulse. Both the Compton backscattered photon sources have possibilities to be used for new tools in various fields such as nuclear physics,materials science,and astronomy.

关键词： laser Compton backscattering polarized γ-ray polarized X-ray